Comprehensive Description

Description

Lupinus albicaulis Dougl. ex Hook., pine lupine, is a native, rapid-developing, deep tap-rooted, multi-stemmed, erect forb, 2½ to 5 feet tall. The plant may be an annual, biennial, or short-lived perennial in various parts of its range. In Oregon, its habit is like a subshrub. The leaves are alternate, palmately compound, with 5 to 9 leaflets that average 1½ inches long. Attractive purple to white banner-type flowers appear in late May and last for about 3 weeks. The seeds are compressed, brown to black in color and mottled with gray. There can be 11,000 to 29,000 seeds per pound.